Table 2

Summary of the prior and posterior ages for the constrained nodes
Constrained nodes Split Minimum age of fossil constraint Median posterior (calculated age) 95% HPD lower 95% HPD upper
X ArchosauromorphaLepidosauromorpha 255 271 259 285.2
Y Crown Archosauria sensu stricto 247 248.3 247 252.8
1 Sphenodon–Varanus (Lepidosauria) 238 240.8 238 249.6
2 Eublepharis–Sphaerodactylus (Gekkonidae) 44 50.5 44 63.3
3 Xantusia–Cordylus 61 67 61 84.3
4 LacertidaeAmphisbaenia 61 66.1 61 80.9
5 Python–Elgaria (Anguimorpha) 148 150.3 148 156.8
6 Varanus–Lanthanotus 48 50.5 48 58.3
7 Heloderma–Anniella 98 100.4 98 108
8 Elgaria–Ophisaurus 33 35.3 33 42.1
9 Chamaeleo–Calumma (chameleons) 19 21.8 19 29.6
10 Physignatus–Ctenophorus 16 18.9 16 26.9
11 Gambelia–Anolis 48 50.5 48 58
12 Shinisaurus–Elgaria 128 129.6 128 134.4

The minimum ages of the fossils were used as hard bounds, and prior ages set as exponentially distributed with a mean = 4.0. The posterior (calculated) ages are listed as median, 95% HDP lower and 95% HDP upper.

Jones et al.

Jones et al. BMC Evolutionary Biology 2013 13:208   doi:10.1186/1471-2148-13-208

Open Data